Tried adding ContextMenu to TextBlock?
<TextBlock Text="{Binding Name}" Width="420" Height="40" Foreground="#FFFF9000" FontSize="30" ManipulationStarted="TextBlock_ManipulationStarted" ManipulationCompleted="TextBlock_ManipulationCompleted">
<toolkit:ContextMenuService.ContextMenu>
<toolkit:ContextMenu Name="ContextMenu" >
<toolkit:MenuItem Name="Watch" Header="Watch Trailer"/>
<toolkit:MenuItem Name="Buy" Header="Buy"/>
<toolkit:MenuItem Name="Share" Header="Share"/>
</toolkit:ContextMenu>
</toolkit:ContextMenuService.ContextMenu>
</TextBlock>